From patchwork Fri Jan 19 10:45:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tudor Ambarus X-Patchwork-Id: 764183 Received: from mail-wm1-f45.google.com (mail-wm1-f45.google.com [209.85.128.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD6884D135 for ; Fri, 19 Jan 2024 10:45:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705661141; cv=none; b=dzlSzzWhCkYejso4r6jQFrrlgTPSLFFcODurtnFv3SSS2YhVPHREbD1Tc1A/XKnd54PDk1VrSnb2gf2h1oonUnYRPdFnrp/dhIe/tt054rsbUjQiMLd8fKPKNmlLe11GdUJRu+REm78nbFtnUXKd6BSoGFDTrvOs+5MSC0xpXsM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705661141; c=relaxed/simple; bh=oEYUcOy19JcxG6WXptwvlTUqdV/Cr+vl3K7z1gXFbpw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VK+DCwVlqawenNP07PHPwq4KZcQcngluutlFklWlDnitYtlmd1LUTMGEbWxdK2KU8ziGKe4pOIytZfYIFo7Ck8Ois64K+hlriKYBWRK6DgGF4/Wp4nJSk9rzwTGCFROH4MvNSscAXXkh3U3/6gIvcHStKmX36Rc3oI66nAOoVJU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=l1h1Iocs; arc=none smtp.client-ip=209.85.128.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="l1h1Iocs" Received: by mail-wm1-f45.google.com with SMTP id 5b1f17b1804b1-40e913e3f03so7062565e9.3 for ; Fri, 19 Jan 2024 02:45:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1705661137; x=1706265937; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=draq2LBr3rh1hsqpn+xELW8VPhSh6bMilJxVO89mlwc=; b=l1h1IocsTOTGdlOQJe84x3IbnwLm2iB2j7LJn5FB4Pibp8Mop8bOIBKSEANH67jjX7 ygY1zSd25caagYGFV/VNRL7JCOIbGHTF2fXThlN5GImLwHnVh+8u31NNe98qlqCAd+Q4 g0UEIKUhD6IllYIo7Z+VYoDBwFp+eZotv8jegf7AIOGFPT5W53yAsbqkdh8huV/kxfng EuTSr92MAfnn0tJXiUt7/z+AsbrwGtDigdb0iRwPU0eOKep2Kt65mDzCQSY9RFUI+ifV tJnZKr5px653PYILJH7+U0+S62dAX35Y83h7TbGYEJtkiGduk+ATvRBIrVTrl23LMiS3 6hkg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1705661137; x=1706265937; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=draq2LBr3rh1hsqpn+xELW8VPhSh6bMilJxVO89mlwc=; b=UYO5SgwdmXr0DGd/i2dvUZPGdai0/tJm8nB+VmOMX51a3QNZAzNQEBA0HOtHMw1VP9 8b68A+wdafq19AH9yaqamyGIxE7UGyNN0R7VVaFknTi1hBI9uIuIucSI3s8NiaJSfw+0 S30mRq3HXYhaOeQPI+2w57tLkMEy+DTaWpo5ydHuEEGYgpX90dnorIMwHaA4lj1sbdbm 4Vq6F58gHPTXCR6d6dNecg1pJSNAwuL1M5DC+XgiT7Eba4R1m7vtbSPW2K/X7SZb6L1v syMtbAC713Um7Q6sO48/XHcWgpUiJ9NaZ+MurnoLy0y+6dvS3PMbJxH9D33A2BllG9SN ZrJg== X-Gm-Message-State: AOJu0YzoXe+yez5Q1K6BrNhxfy5DJReTV1oYI8OmLygRjKQ3WCobZXo2 b7NF2Mi/G4hGVvKVeUMbQizz+NpnjGqWXkduxW0RmlcDEP7mlEvunY6jhStwjzQ= X-Google-Smtp-Source: AGHT+IGpcApyIWJFtLX0iIOlhoAeQ17PNEjsoOdq7qV3HI9GzWTu3avyi91tcVAFJS0Xme35Yc5gZg== X-Received: by 2002:a05:600c:524a:b0:40d:8815:afff with SMTP id fc10-20020a05600c524a00b0040d8815afffmr1597586wmb.39.1705661136915; Fri, 19 Jan 2024 02:45:36 -0800 (PST) Received: from ta2.c.googlers.com.com (88.140.78.34.bc.googleusercontent.com. [34.78.140.88]) by smtp.gmail.com with ESMTPSA id fm16-20020a05600c0c1000b0040ea10178f3sm77470wmb.21.2024.01.19.02.45.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Jan 2024 02:45:36 -0800 (PST) From: Tudor Ambarus To: gregkh@linuxfoundation.org, jirislaby@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org Cc: alim.akhtar@samsung.com, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, andre.draszik@linaro.org, kernel-team@android.com, peter.griffin@linaro.org, semen.protsenko@linaro.org, willmcvicker@google.com, Tudor Ambarus Subject: [PATCH v2 08/19] tty: serial: samsung: use u32 for register interactions Date: Fri, 19 Jan 2024 10:45:15 +0000 Message-ID: <20240119104526.1221243-9-tudor.ambarus@linaro.org> X-Mailer: git-send-email 2.43.0.429.g432eaa2c6b-goog In-Reply-To: <20240119104526.1221243-1-tudor.ambarus@linaro.org> References: <20240119104526.1221243-1-tudor.ambarus@linaro.org> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 All registers of the IP have 32 bits. Use u32 variables when reading or writing from/to the registers. The purpose of those variables becomes clearer. Reviewed-by: Sam Protsenko Signed-off-by: Tudor Ambarus --- drivers/tty/serial/samsung_tty.c | 79 ++++++++++++++++---------------- 1 file changed, 39 insertions(+), 40 deletions(-) diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index b9b91ff6a1d7..8b396c950933 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -199,7 +199,7 @@ static void wr_reg(const struct uart_port *port, u32 reg, u32 val) /* Byte-order aware bit setting/clearing functions. */ static inline void s3c24xx_set_bit(const struct uart_port *port, int idx, - unsigned int reg) + u32 reg) { unsigned long flags; u32 val; @@ -212,7 +212,7 @@ static inline void s3c24xx_set_bit(const struct uart_port *port, int idx, } static inline void s3c24xx_clear_bit(const struct uart_port *port, int idx, - unsigned int reg) + u32 reg) { unsigned long flags; u32 val; @@ -245,8 +245,8 @@ static void s3c24xx_serial_rx_enable(struct uart_port *port) { struct s3c24xx_uart_port *ourport = to_ourport(port); unsigned long flags; - unsigned int ucon, ufcon; int count = 10000; + u32 ucon, ufcon; uart_port_lock_irqsave(port, &flags); @@ -269,7 +269,7 @@ static void s3c24xx_serial_rx_disable(struct uart_port *port) { struct s3c24xx_uart_port *ourport = to_ourport(port); unsigned long flags; - unsigned int ucon; + u32 ucon; uart_port_lock_irqsave(port, &flags); @@ -591,7 +591,7 @@ static inline const struct s3c2410_uartcfg } static int s3c24xx_serial_rx_fifocnt(const struct s3c24xx_uart_port *ourport, - unsigned long ufstat) + u32 ufstat) { const struct s3c24xx_uart_info *info = ourport->info; @@ -663,7 +663,7 @@ static void s3c64xx_start_rx_dma(struct s3c24xx_uart_port *ourport) static void enable_rx_dma(struct s3c24xx_uart_port *ourport) { struct uart_port *port = &ourport->port; - unsigned int ucon; + u32 ucon; /* set Rx mode to DMA mode */ ucon = rd_regl(port, S3C2410_UCON); @@ -686,7 +686,7 @@ static void enable_rx_dma(struct s3c24xx_uart_port *ourport) static void enable_rx_pio(struct s3c24xx_uart_port *ourport) { struct uart_port *port = &ourport->port; - unsigned int ucon; + u32 ucon; /* set Rx mode to DMA mode */ ucon = rd_regl(port, S3C2410_UCON); @@ -711,13 +711,14 @@ static void s3c24xx_serial_rx_drain_fifo(struct s3c24xx_uart_port *ourport); static irqreturn_t s3c24xx_serial_rx_chars_dma(void *dev_id) { - unsigned int utrstat, received; struct s3c24xx_uart_port *ourport = dev_id; struct uart_port *port = &ourport->port; struct s3c24xx_uart_dma *dma = ourport->dma; struct tty_struct *tty = tty_port_tty_get(&ourport->port.state->port); struct tty_port *t = &port->state->port; struct dma_tx_state state; + unsigned int received; + u32 utrstat; utrstat = rd_regl(port, S3C2410_UTRSTAT); rd_regl(port, S3C2410_UFSTAT); @@ -759,9 +760,9 @@ static irqreturn_t s3c24xx_serial_rx_chars_dma(void *dev_id) static void s3c24xx_serial_rx_drain_fifo(struct s3c24xx_uart_port *ourport) { struct uart_port *port = &ourport->port; - unsigned int ufcon, ufstat, uerstat; unsigned int fifocnt = 0; int max_count = port->fifosize; + u32 ufcon, ufstat, uerstat; u8 ch, flag; while (max_count-- > 0) { @@ -945,7 +946,7 @@ static irqreturn_t s3c64xx_serial_handle_irq(int irq, void *id) { const struct s3c24xx_uart_port *ourport = id; const struct uart_port *port = &ourport->port; - unsigned int pend = rd_regl(port, S3C64XX_UINTP); + u32 pend = rd_regl(port, S3C64XX_UINTP); irqreturn_t ret = IRQ_HANDLED; if (pend & S3C64XX_UINTM_RXD_MSK) { @@ -964,7 +965,7 @@ static irqreturn_t apple_serial_handle_irq(int irq, void *id) { const struct s3c24xx_uart_port *ourport = id; const struct uart_port *port = &ourport->port; - unsigned int pend = rd_regl(port, S3C2410_UTRSTAT); + u32 pend = rd_regl(port, S3C2410_UTRSTAT); irqreturn_t ret = IRQ_NONE; if (pend & (APPLE_S5L_UTRSTAT_RXTHRESH | APPLE_S5L_UTRSTAT_RXTO)) { @@ -983,8 +984,8 @@ static irqreturn_t apple_serial_handle_irq(int irq, void *id) static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port) { const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - unsigned long ufstat = rd_regl(port, S3C2410_UFSTAT); - unsigned long ufcon = rd_regl(port, S3C2410_UFCON); + u32 ufstat = rd_regl(port, S3C2410_UFSTAT); + u32 ufcon = rd_regl(port, S3C2410_UFCON); if (ufcon & S3C2410_UFCON_FIFOMODE) { if ((ufstat & info->tx_fifomask) != 0 || @@ -999,7 +1000,7 @@ static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port) /* no modem control lines */ static unsigned int s3c24xx_serial_get_mctrl(struct uart_port *port) { - unsigned int umstat = rd_reg(port, S3C2410_UMSTAT); + u32 umstat = rd_reg(port, S3C2410_UMSTAT); if (umstat & S3C2410_UMSTAT_CTS) return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; @@ -1009,8 +1010,8 @@ static unsigned int s3c24xx_serial_get_mctrl(struct uart_port *port) static void s3c24xx_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) { - unsigned int umcon = rd_regl(port, S3C2410_UMCON); - unsigned int ucon = rd_regl(port, S3C2410_UCON); + u32 umcon = rd_regl(port, S3C2410_UMCON); + u32 ucon = rd_regl(port, S3C2410_UCON); if (mctrl & TIOCM_RTS) umcon |= S3C2410_UMCOM_RTS_LOW; @@ -1030,7 +1031,7 @@ static void s3c24xx_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) static void s3c24xx_serial_break_ctl(struct uart_port *port, int break_state) { unsigned long flags; - unsigned int ucon; + u32 ucon; uart_port_lock_irqsave(port, &flags); @@ -1188,7 +1189,7 @@ static void apple_s5l_serial_shutdown(struct uart_port *port) { struct s3c24xx_uart_port *ourport = to_ourport(port); - unsigned int ucon; + u32 ucon; ucon = rd_regl(port, S3C2410_UCON); ucon &= ~(APPLE_S5L_UCON_TXTHRESH_ENA_MSK | @@ -1214,7 +1215,7 @@ static int s3c64xx_serial_startup(struct uart_port *port) { struct s3c24xx_uart_port *ourport = to_ourport(port); unsigned long flags; - unsigned int ufcon; + u32 ufcon; int ret; wr_regl(port, S3C64XX_UINTM, 0xf); @@ -1259,7 +1260,7 @@ static int apple_s5l_serial_startup(struct uart_port *port) { struct s3c24xx_uart_port *ourport = to_ourport(port); unsigned long flags; - unsigned int ufcon; + u32 ufcon; int ret; wr_regl(port, S3C2410_UTRSTAT, APPLE_S5L_UTRSTAT_ALL_FLAGS); @@ -1344,7 +1345,7 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level, static inline int s3c24xx_serial_getsource(struct uart_port *port) { const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - unsigned int ucon; + u32 ucon; if (info->num_clks == 1) return 0; @@ -1358,7 +1359,7 @@ static void s3c24xx_serial_setsource(struct uart_port *port, unsigned int clk_sel) { const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - unsigned int ucon; + u32 ucon; if (info->num_clks == 1) return; @@ -1475,9 +1476,8 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, struct clk *clk = ERR_PTR(-EINVAL); unsigned long flags; unsigned int baud, quot, clk_sel = 0; - unsigned int ulcon; - unsigned int umcon; unsigned int udivslot = 0; + u32 ulcon, umcon; /* * We don't support modem control lines. @@ -1759,7 +1759,7 @@ static void s3c24xx_serial_resetport(struct uart_port *port, const struct s3c2410_uartcfg *cfg) { const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - unsigned long ucon = rd_regl(port, S3C2410_UCON); + u32 ucon = rd_regl(port, S3C2410_UCON); ucon &= (info->clksel_mask | info->ucon_mask); wr_regl(port, S3C2410_UCON, ucon | cfg->ucon); @@ -1905,7 +1905,7 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, wr_regl(port, S3C64XX_UINTSP, 0xf); break; case TYPE_APPLE_S5L: { - unsigned int ucon; + u32 ucon; ucon = rd_regl(port, S3C2410_UCON); ucon &= ~(APPLE_S5L_UCON_TXTHRESH_ENA_MSK | @@ -2109,7 +2109,7 @@ static int s3c24xx_serial_resume_noirq(struct device *dev) /* restore IRQ mask */ switch (ourport->info->type) { case TYPE_S3C6400: { - unsigned int uintm = 0xf; + u32 uintm = 0xf; if (ourport->tx_enabled) uintm &= ~S3C64XX_UINTM_TXD_MSK; @@ -2125,7 +2125,7 @@ static int s3c24xx_serial_resume_noirq(struct device *dev) break; } case TYPE_APPLE_S5L: { - unsigned int ucon; + u32 ucon; int ret; ret = clk_prepare_enable(ourport->clk); @@ -2187,10 +2187,10 @@ static const struct dev_pm_ops s3c24xx_serial_pm_ops = { static struct uart_port *cons_uart; static int -s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon) +s3c24xx_serial_console_txrdy(struct uart_port *port, u32 ufcon) { const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - unsigned long ufstat, utrstat; + u32 ufstat, utrstat; if (ufcon & S3C2410_UFCON_FIFOMODE) { /* fifo mode - check amount of data in fifo registers... */ @@ -2206,7 +2206,7 @@ s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon) } static bool -s3c24xx_port_configured(unsigned int ucon) +s3c24xx_port_configured(u32 ucon) { /* consider the serial port configured if the tx/rx mode set */ return (ucon & 0xf) != 0; @@ -2221,7 +2221,7 @@ s3c24xx_port_configured(unsigned int ucon) static int s3c24xx_serial_get_poll_char(struct uart_port *port) { const struct s3c24xx_uart_port *ourport = to_ourport(port); - unsigned int ufstat; + u32 ufstat; ufstat = rd_regl(port, S3C2410_UFSTAT); if (s3c24xx_serial_rx_fifocnt(ourport, ufstat) == 0) @@ -2233,8 +2233,8 @@ static int s3c24xx_serial_get_poll_char(struct uart_port *port) static void s3c24xx_serial_put_poll_char(struct uart_port *port, unsigned char c) { - unsigned int ufcon = rd_regl(port, S3C2410_UFCON); - unsigned int ucon = rd_regl(port, S3C2410_UCON); + u32 ufcon = rd_regl(port, S3C2410_UFCON); + u32 ucon = rd_regl(port, S3C2410_UCON); /* not possible to xmit on unconfigured port */ if (!s3c24xx_port_configured(ucon)) @@ -2250,7 +2250,7 @@ static void s3c24xx_serial_put_poll_char(struct uart_port *port, static void s3c24xx_serial_console_putchar(struct uart_port *port, unsigned char ch) { - unsigned int ufcon = rd_regl(port, S3C2410_UFCON); + u32 ufcon = rd_regl(port, S3C2410_UFCON); while (!s3c24xx_serial_console_txrdy(port, ufcon)) cpu_relax(); @@ -2261,7 +2261,7 @@ static void s3c24xx_serial_console_write(struct console *co, const char *s, unsigned int count) { - unsigned int ucon = rd_regl(cons_uart, S3C2410_UCON); + u32 ucon = rd_regl(cons_uart, S3C2410_UCON); unsigned long flags; bool locked = true; @@ -2288,11 +2288,9 @@ s3c24xx_serial_get_options(struct uart_port *port, int *baud, int *parity, int *bits) { struct clk *clk; - unsigned int ulcon; - unsigned int ucon; - unsigned int ubrdiv; unsigned long rate; unsigned int clk_sel; + u32 ulcon, ucon, ubrdiv; char clk_name[MAX_CLK_NAME_LENGTH]; ulcon = rd_regl(port, S3C2410_ULCON); @@ -2742,7 +2740,8 @@ static int samsung_early_read(struct console *con, char *s, unsigned int n) { struct earlycon_device *dev = con->data; const struct samsung_early_console_data *data = dev->port.private_data; - int ch, ufstat, num_read = 0; + int num_read = 0; + u32 ch, ufstat; while (num_read < n) { ufstat = rd_regl(&dev->port, S3C2410_UFSTAT);